Map of Lac Fraser with depth contours

Lac Fraser

45.8385° N, 74.5007° W

Depth contours from the 2016 government survey. Not for navigation.

Download the depth map (SVG)

Lac Fraser is 40.5 m deep at its deepest point, deeper than 89% of the 1,506 surveyed lakes in Quebec. It covers 1.05 km² and lies 2.7 km northeast of Lost River.

Maximum depth
40.5 msurveyed 2016
deeper than 89% of the 1,506 surveyed lakes in Quebec
Area
1.05 km²
larger than 75% of the 29,407 lakes in Quebec
Shoreline
7.5 km
longer than 72% of the 29,407 lakes in Quebec
Water clarity
5.7 mSecchi depth, 2023
clearer than 80% of the 805 monitored lakes in Quebec
Elevation
251 m

Today on the water

4 °C

Wind calm

Observed at Sainte-Agathe, as of 4:00 a.m. EDT

choppy Estimated waves, next 12 hours: up to 0.2 m. Around 12 p.m., wind from the west: the west shore is sheltered, waves build toward the east shore.

Hourly forecast, next 24 hours
Time5 a.m.8 a.m.11 a.m.2 p.m.5 p.m.8 p.m.11 p.m.2 a.m.
Wind km/hW 10W 10W 10W 20W 20W 10W 10NW 10
Waves (est.) m0.10.10.10.20.2
Temp. °C668108520
Precip. %6040404040000

Tonight: Partly cloudy with 60 percent chance of showers. Wind west 20 km/h becoming light this evening. Low 6.

Weather: Sainte-Agathe (local forecast), as of 4:02 a.m. EDT

Sun and moon

Civil dawn
6:36 a.m.
Sunrise
7:06 a.m.
Sunset
6:22 p.m.
Civil dusk
6:52 p.m.
Moonrise
5:57 a.m.
Moonset
5:41 p.m.
Moon
Waning crescent, 1% lit

Data Source: Environment and Climate Change Canada. Local times.

How waves are estimated

Significant wave height from the forecast hourly wind and the open-water distance (fetch) upwind, using the SMB method (US Army Corps of Engineers Shore Protection Manual, 1984), rounded up to the next 0.1 m. It is not a measurement: gusts, leftover swell and shoals can make water rougher. Under 0.2 m: calm; 0.2–0.5 m: choppy; over 0.5 m: rough.

Depth

20% of Lac Fraser is deeper than 20 m.

How to read it: the lake’s area is sorted from the shore to the deepest point. Where the curve is flat, large areas share one depth (flats and weed beds); where it drops, depth changes quickly (drop-offs).

The government depth survey from 2016 records a maximum depth of 40.5 m, drawn from 17 depth contours.

Not for navigation. Depths are from government surveys and may be outdated.

Water

Trophic status from the latest monitoring: oligotrophic.

Clarity was measured with a Secchi disk in 8 years between 2015 and 2023; the latest annual mean is 5.7 m.

Water clarity (Secchi depth, m)
Total phosphorus (µg/L)